I am your host and nerd, John Green. By the way, you should be doing this. This is your first stretch.

This is not a game of Simon Says - you just do it. You don't have to wait for me to give you some secret code. Feel the burn right there.

Hold it! Alright! Our second stretch...is the "Teacher!

Please call on me! It's me! I know the answer!

I do! Ah! Call on me, teacher!" You feel it right in there.

You feel that? I know I look good. I know.

So do you. And the other side! "Why don't you call on me? It goes so much faster if you just call on the smart kids!

You only call on the dumb kids! It takes forever to learn anything! Please call on me!" Alright!

Good stretch! Alright, Hank, our final stretch is my middle school move. When I was in middle school, I wasn't content just to say "hello!" - I had to have a move that involved saying hello, and the move was this. *slaps leg and points* "Hello!" It did not turn out to be a great social strategy, but it is an excellent stretch!

Ah! You know you have had a lot of sit-ups when you get to the zero, the first zero, in the calculation of pi. Now, if you want a great workout, go to the second zero.

Now, let's move on. Now, you're through school, you're on your way home...it's time to run from the bully! For this portion of the exercise program, I'll need you to have a hardcover book in your pants.

Trust me! It will come in handy later. There you go.

Alright, and run from the bully! Run from the bully! Run from the bully!

Run from the bully! Keep those knees up. Keep those knees up!

Run! He wants your lunch money. You don't wanna give it to him.

That's your lunch money! Your mom gave it to you- ow! You gotta get the book way down in there.

That's an important part of the program. Keep going! Run home to your mommy!

Your mommy is on the other end, and she will protect you! You can do it, my fellow nerds! You can do it!

Oh no. You're gonna have to fight the bully. Now, when it comes time to confront your bully, I'm not gonna tell you to throw a punch - that wouldn't be very nerdy of you.

Here's what we're gonna do. We're gonna dodge! We're gonna dodge!

And dodge! And dodge! You're gonna need to deflect punches.

Dodge, and deflect! Dodge, and deflect! Why is that funny? *laughter* (Ahhh, it's just funny.)Dodge, and deflect!

And dodge, deflect! Dodge, deflect! Nerdfighters don't throw punches!

But we do deflect them! Dodge, deflect! Dodge, deflect!

Dodge, deflect! Dodge, deflect! This isn't just aerobic - it also builds muscle.

And dodge, deflect! And dodge, deflect! Okay!

You've beaten the bully. Congratulations. You have, successfully, dodged and deflected his punches until he got bored and ran away.

He did get in a couple of belly shots - that's why you had the book. It hurt him more than it hurt you. Alright nerds, we're near the end of our day, and therefore, near the end of our fitness workout.

What do we love to do in the evening after our homework is done? A lot of us like to read, but others of us like to play video games. So, this is the video game section.

Nerdfighters, you've done a great job today getting fit with your fitness master, John Green. I want you to breathe deeply...and out... Just let all the stress of the day out with your big breaths.

I want you to forget about the fact that you're wearing aqua leggings and argyle socks and purple lady-shorts. I want you to forget about the fact that you're wearing a sweatshirt that was made for a girl, that has cut-off arms, and says "Keep Dancing." I want you to let it all go. And what will come instead is peace and deep, sustaining, nerdiness.